Elias m



(No Model.) E. M. WATSON.

PIPE WRENGH.

No. 457,064. Patented Aug. 4, 1891.

UNITED STATES PATENT OFFICE.

ELIAS M. IVATSON, OFBELOIT, IVISCONSIN.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 457,064, dated August4, 1891. Application filed April 23, 1887. Renewed June 27, 1891. $erialNo. 397,702- (No'nlodehl To all whom it may concern;

Be it known that I, ELIAS M. \VATsON, of Beloit, in the county of Rockand State of Visconsin, have invented certain new and usefulImprovements in Pipe-Vrenches, of which the following is a description,reference being had to the accompanying drawmgs.

The objects of my invention are, first, to provide novel means forpivoting the two jaws together, so that they will neither bind nor workloose and so that they may be readily adjusted for use on differentsizes of pipe, and, second, to provide novel means for removably securing a steel bit to one jaw thereof.

To this end it consists in the construction and combination of partsherein fully de scribed, and pointed out in the'claims.

In the drawings, Figure l is a side view of my improved wrench. 2 is aback edge view of the shorter jaw. Fig. 3 is aside view of the upper endof the shorter jaw. Fig. 4 is a perspective view of the collar whichsurrounds the stud on said jaw, and Fig. 5 is a vertical section on theline war in Fig. 1. Fig. 6 is .a side view of an alternative form of myinvention. I

In the drawings, which show wrench in its preferable form, the shortjaw, and B the long which have handles extending beyond their pivot. Thelong jaw is provided with the usual hooked or curved end adapted tograsp the pipe, and also witha slot or mortise 1), throu h which thepivoting devices pass. The jaw A is provided with a cylindrical stud a,standing at right angles to the face of the jaw and made integral withit, which stud is made hollow to permit the passage of a bolt D.

0 represents a collar adapted to fit over the stud a and turn freelyupon it. This collar is provided with a flange 0 around its upper edge,as shown in Fig. 4, and preferably with parallel sides, which fitbetween the sides of the slot 1) in the jaw B, so that the collar canslide freely back and forth in said slot, but which causes the jaw B andcollar 0 to revolve together.

The jaws are secured together as follows: The stud a is inserted in theslot 1), and the collar 0 is then slipped over said stud. The body ofthe said collar lies in the slot 6, while my improved jaw, both of Arepresents.

the flange 0 extends beyond the edges of the slot. A bolt D is passedthrough the slot and fastened by a nut (Z. The head bears upon the studa, which extends slightly beyond the collar, and the nut may thereforebe secured as tightly as necessary to hold the parts together withoutaffecting the free motion of the jaws. The bolt-head holds the collarfrom slipping off, and the flange on the collar performs the same officewith respect to the jaw B. By this construction the jaws may be adjustedto fit various sizes of pipes without unscrewing the nut 61 by screwingin or out the thumb-screw b, the inner end of which bears against thecollar 0. Another advantage of this construction is that the motion ofthe jaws does not tend to loosen the nut, because there is substantiallyno friction between the bolt and nut which are secured to the jaw A andmove with it and any other point of the device which moves independentlyof it.

While the above-described construction is preferable, there are severalless desirable modifications which, as at present informed, I regard asembodying the principle of the invention shown. For instance, the bodyof the collar 0 might be cylindrical instead of having parallel sides,or said collar might be omitted altogether and the bolt-head extend overthe jaw B at the sides of the slot. This last modification, while itwould be operative, would certainly not be as durable as the form shown,and obviously would be inferior to it in other respects.

Itis found that in use the short jaw wears out much quicker than thelong curved jaw, and various means have been devised for securinga steelbit to said short jaw, so that said bit may be removed when dulled orWOIIL' The means I have devised for this purpose are as follows: Iprovide the end of said. short jaw with a mortise, into which a steelbit E may be driven, and in which said bit is held by the friction. Inthe side of the jaw I provide orifices a, connecting with said mortisebelow the lower end of the bit E. When it is desired to remove said bitto turn it around or to replace it by anew one, awedge or plug is driveninto these orifices a behind the bit, and the bit is thereby forced out.The bit may be made rectangular, in which case it has four edges, whichmay be used to bite on the pipe. In this case the mortise must beaccurately formed to fit the bit, or the bit may be made tapering, inwhich case it would 5 have but two edges available for use, but themortise would not need to be so accurately formed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters [0 Patent, is

1. The combination of the jaw B, containing the slot 1) and providedwith the screw 1), with the collar 0, fitted into said slot, and withthe jaw A, having a hollow stud a, passmg through said collar andforming: an abutment for the bolt D, as and for the purpose stated.

2. In a pipe-wrench, a jaw A, having a 1nortise in its end, a bit 1*,driven into said mortise and held there by friction with the wallsthereof, and a hole a, extending through the side of said jaw into saidmortise back of the bit F, as and for the purpose stated.

ELIAS M. WATSON. \Vitnessesz J AS. W. ALLEN, S. T. WRAY.

